Sit or lie down and rest
Take slow, deep breaths
Drink water
Avoid caffeine, nicotine, and alcohol
Cool down if you are overheated
Loosen tight clothing
Try gentle relaxation or meditation
Avoid strenuous activity until your heart rate settles
Check for fever, pain, stress, or anxiety and address the cause
Seek urgent medical help if you have chest pain, shortness of breath, fainting, or a very fast heart rate that does not improve